Cancer is a leading cause of death worldwide, and the prevalence of obesity has more than doubled over the past 40 years
Numerous meta-analyses support the link between excess body weight and increased risk of developing and dying from several types of cancer
The reported associations may be causal for some malignancies, but they may be flawed owing to inherent biases that exaggerate the effect of obesity on cancer incidence and mortality
What this study adds
Strong evidence supported the association between obesity and only 11 of 36 cancer sites and subtypes, predominantly comprising cancers of digestive organs and hormone related malignancies in women
Other associations could be genuine, but substantial uncertainty remains
9:05 am
6 Mar 17